1 /*- 2 * Copyright (c) 2001, 2002 Scott Long <scottl@freebsd.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 29 /* udf_vfsops.c */ 30 /* Implement the VFS side of things */ 31 32 /* 33 * Ok, here's how it goes. The UDF specs are pretty clear on how each data 34 * structure is made up, but not very clear on how they relate to each other. 35 * Here is the skinny... This demostrates a filesystem with one file in the 36 * root directory. Subdirectories are treated just as normal files, but they 37 * have File Id Descriptors of their children as their file data. As for the 38 * Anchor Volume Descriptor Pointer, it can exist in two of the following three 39 * places: sector 256, sector n (the max sector of the disk), or sector 40 * n - 256. It's a pretty good bet that one will exist at sector 256 though. 41 * One caveat is unclosed CD media. For that, sector 256 cannot be written, 42 * so the Anchor Volume Descriptor Pointer can exist at sector 512 until the 43 * media is closed. 44 * 45 * Sector: 46 * 256: 47 * n: Anchor Volume Descriptor Pointer 48 * n - 256: | 49 * | 50 * |-->Main Volume Descriptor Sequence 51 * | | 52 * | | 53 * | |-->Logical Volume Descriptor 54 * | | 55 * |-->Partition Descriptor | 56 * | | 57 * | | 58 * |-->Fileset Descriptor 59 * | 60 * | 61 * |-->Root Dir File Entry 62 * | 63 * | 64 * |-->File data: 65 * File Id Descriptor 66 * | 67 * | 68 * |-->File Entry 69 * | 70 * | 71 * |-->File data 72 */ 73 #include <sys/types.h> 74 #include <sys/param.h> 75 #include <sys/systm.h> 76 #include <sys/uio.h> 77 #include <sys/bio.h> 78 #include <sys/buf.h> 79 #include <sys/conf.h> 80 #include <sys/dirent.h> 81 #include <sys/fcntl.h> 82 #include <sys/kernel.h> 83 #include <sys/malloc.h> 84 #include <sys/mount.h> 85 #include <sys/namei.h> 86 #include <sys/proc.h> 87 #include <sys/queue.h> 88 #include <sys/vnode.h> 89 90 #include <vm/uma.h> 91 92 #include <fs/udf/ecma167-udf.h> 93 #include <fs/udf/udf.h> 94 #include <fs/udf/osta.h> 95 96 MALLOC_DEFINE(M_UDFMOUNT, "UDF mount", "UDF mount structure"); 97 MALLOC_DEFINE(M_UDFFENTRY, "UDF fentry", "UDF file entry structure"); 98 99 /* Zones */ 100 uma_zone_t udf_zone_trans = NULL; 101 uma_zone_t udf_zone_node = NULL; 102 uma_zone_t udf_zone_ds = NULL; 103 104 static int udf_init(struct vfsconf *); 105 static int udf_uninit(struct vfsconf *); 106 static int udf_mount(struct mount *, struct nameidata *, struct thread *); 107 static int udf_unmount(struct mount *, int, struct thread *); 108 static int udf_root(struct mount *, struct vnode **); 109 static int udf_statfs(struct mount *, struct statfs *, struct thread *); 110 static int udf_fhtovp(struct mount *, struct fid *, struct vnode **); 111 static int udf_vptofh(struct vnode *, struct fid *); 112 static int udf_find_partmaps(struct udf_mnt *, struct logvol_desc *); 113 114 static struct vfsops udf_vfsops = { 115 NULL, 116 vfs_stdstart, 117 udf_unmount, 118 udf_root, 119 vfs_stdquotactl, 120 udf_statfs, 121 vfs_stdnosync, 122 udf_vget, 123 udf_fhtovp, 124 vfs_stdcheckexp, 125 udf_vptofh, 126 udf_init, 127 udf_uninit, 128 vfs_stdextattrctl, 129 udf_mount, 130 }; 131 VFS_SET(udf_vfsops, udf, VFCF_READONLY); 132 133 static int udf_mountfs(struct vnode *, struct mount *, struct thread *); 134 135 static int 136 udf_init(struct vfsconf *foo) 137 { 138 139 /* 140 * This code used to pre-allocate a certain number of pages for each 141 * pool, reducing the need to grow the zones later on. UMA doesn't 142 * advertise any such functionality, unfortunately =-< 143 */ 144 udf_zone_trans = uma_zcreate("UDF translation buffer, zone", MAXNAMLEN * 145 sizeof(unicode_t), NULL, NULL, NULL, NULL, 0, 0); 146 147 udf_zone_node = uma_zcreate("UDF Node zone", sizeof(struct udf_node), 148 NULL, NULL, NULL, NULL, 0, 0); 149 150 udf_zone_ds = uma_zcreate("UDF Dirstream zone", 151 sizeof(struct udf_dirstream), NULL, NULL, NULL, NULL, 0, 0); 152 153 if ((udf_zone_node == NULL) || (udf_zone_trans == NULL) || 154 (udf_zone_ds == NULL)) { 155 printf("Cannot create allocation zones.\n"); 156 return (ENOMEM); 157 } 158 159 return 0; 160 } 161 162 static int 163 udf_uninit(struct vfsconf *foo) 164 { 165 166 if (udf_zone_trans != NULL) { 167 uma_zdestroy(udf_zone_trans); 168 udf_zone_trans = NULL; 169 } 170 171 if (udf_zone_node != NULL) { 172 uma_zdestroy(udf_zone_node); 173 udf_zone_node = NULL; 174 } 175 176 if (udf_zone_ds != NULL) { 177 uma_zdestroy(udf_zone_ds); 178 udf_zone_ds = NULL; 179 } 180 181 return (0); 182 } 183 184 static int 185 udf_mount(struct mount *mp, struct nameidata *ndp, struct thread *td) 186 { 187 struct vnode *devvp; /* vnode of the mount device */ 188 struct udf_mnt *imp = 0; 189 struct export_args *export; 190 struct vfsoptlist *opts; 191 char *fspec; 192 size_t size; 193 int error, len; 194 195 opts = mp->mnt_optnew; 196 197 if ((mp->mnt_flag & MNT_RDONLY) == 0) 198 return (EROFS); 199 200 /* 201 * No root filesystem support. Probably not a big deal, since the 202 * bootloader doesn't understand UDF. 203 */ 204 if (mp->mnt_flag & MNT_ROOTFS) 205 return (ENOTSUP); 206 207 fspec = NULL; 208 error = vfs_getopt(opts, "from", (void **)&fspec, &len); 209 if (!error && fspec[len - 1] != '\0') 210 return (EINVAL); 211 212 if (mp->mnt_flag & MNT_UPDATE) { 213 imp = VFSTOUDFFS(mp); 214 if (fspec == NULL) { 215 error = vfs_getopt(opts, "export", (void **)&export, 216 &len); 217 if (error || len != sizeof(struct export_args)) 218 return (EINVAL); 219 return (vfs_export(mp, export)); 220 } 221 } 222 223 /* Check that the mount device exists */ 224 if (fspec == NULL) 225 return (EINVAL); 226 NDINIT(ndp, LOOKUP, FOLLOW, UIO_SYSSPACE, fspec, td); 227 if ((error = namei(ndp))) 228 return (error); 229 NDFREE(ndp, NDF_ONLY_PNBUF); 230 devvp = ndp->ni_vp; 231 232 if (vn_isdisk(devvp, &error) == 0) { 233 vrele(devvp); 234 return (error); 235 } 236 237 /* Check the access rights on the mount device */ 238 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 239 error = VOP_ACCESS(devvp, VREAD, td->td_ucred, td); 240 if (error) 241 error = suser(td); 242 if (error) { 243 vput(devvp); 244 return (error); 245 } 246 VOP_UNLOCK(devvp, 0, td); 247 248 if ((error = udf_mountfs(devvp, mp, td))) { 249 vrele(devvp); 250 return (error); 251 } 252 253 imp = VFSTOUDFFS(mp); 254 copystr(fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, &size); 255 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); 256 udf_statfs(mp, &mp->mnt_stat, td); 257 return 0; 258 }; 259 260 /* 261 * Check the descriptor tag for both the correct id and correct checksum. 262 * Return zero if all is good, EINVAL if not. 263 */ 264 int 265 udf_checktag(struct desc_tag *tag, uint16_t id) 266 { 267 uint8_t *itag; 268 uint8_t i, cksum = 0; 269 270 itag = (uint8_t *)tag; 271 272 if (tag->id != id) 273 return (EINVAL); 274 275 for (i = 0; i < 15; i++) 276 cksum = cksum + itag[i]; 277 cksum = cksum - itag[4]; 278 279 if (cksum == tag->cksum) 280 return (0); 281 282 return (EINVAL); 283 } 284 285 static int 286 udf_mountfs(struct vnode *devvp, struct mount *mp, struct thread *td) { 287 struct buf *bp = NULL; 288 struct anchor_vdp avdp; 289 struct udf_mnt *udfmp = NULL; 290 struct part_desc *pd; 291 struct logvol_desc *lvd; 292 struct fileset_desc *fsd; 293 struct file_entry *root_fentry; 294 uint32_t sector, size, mvds_start, mvds_end; 295 uint32_t fsd_offset = 0; 296 uint16_t part_num = 0, fsd_part = 0; 297 int error = EINVAL, needclose = 0; 298 int logvol_found = 0, part_found = 0, fsd_found = 0; 299 int bsize; 300 301 /* 302 * Disallow multiple mounts of the same device. Flush the buffer 303 * cache for the device. 304 */ 305 if ((error = vfs_mountedon(devvp))) 306 return (error); 307 if (vcount(devvp) > 1) 308 return (EBUSY); 309 if ((error = vinvalbuf(devvp, V_SAVE, td->td_ucred, td, 0, 0))) 310 return (error); 311 312 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 313 error = VOP_OPEN(devvp, FREAD, FSCRED, td); 314 VOP_UNLOCK(devvp, 0, td); 315 if (error) 316 return error; 317 needclose = 1; 318 319 MALLOC(udfmp, struct udf_mnt *, sizeof(struct udf_mnt), M_UDFMOUNT, 320 M_NOWAIT | M_ZERO); 321 if (udfmp == NULL) { 322 printf("Cannot allocate UDF mount struct\n"); 323 error = ENOMEM; 324 goto bail; 325 } 326 327 mp->mnt_data = (qaddr_t)udfmp; 328 mp->mnt_stat.f_fsid.val[0] = dev2udev(devvp->v_rdev); 329 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum; 330 mp->mnt_flag |= MNT_LOCAL; 331 udfmp->im_mountp = mp; 332 udfmp->im_dev = devvp->v_rdev; 333 udfmp->im_devvp = devvp; 334 335 bsize = 2048; /* XXX Should probe the media for it's size */ 336 337 /* 338 * Get the Anchor Volume Descriptor Pointer from sector 256. 339 * XXX Should also check sector n - 256, n, and 512. 340 */ 341 sector = 256; 342 if ((error = bread(devvp, sector * btodb(bsize), bsize, NOCRED, 343 &bp)) != 0) 344 goto bail; 345 if ((error = udf_checktag((struct desc_tag *)bp->b_data, TAGID_ANCHOR))) 346 goto bail; 347 348 bcopy(bp->b_data, &avdp, sizeof(struct anchor_vdp)); 349 brelse(bp); 350 bp = NULL; 351 352 /* 353 * Extract the Partition Descriptor and Logical Volume Descriptor 354 * from the Volume Descriptor Sequence. 355 * XXX Should we care about the partition type right now? 356 * XXX What about multiple partitions? 357 */ 358 mvds_start = avdp.main_vds_ex.loc; 359 mvds_end = mvds_start + (avdp.main_vds_ex.len - 1) / bsize; 360 for (sector = mvds_start; sector < mvds_end; sector++) { 361 if ((error = bread(devvp, sector * btodb(bsize), bsize, 362 NOCRED, &bp)) != 0) { 363 printf("Can't read sector %d of VDS\n", sector); 364 goto bail; 365 } 366 lvd = (struct logvol_desc *)bp->b_data; 367 if (!udf_checktag(&lvd->tag, TAGID_LOGVOL)) { 368 udfmp->bsize = lvd->lb_size; 369 udfmp->bmask = udfmp->bsize - 1; 370 udfmp->bshift = ffs(udfmp->bsize) - 1; 371 fsd_part = lvd->_lvd_use.fsd_loc.loc.part_num; 372 fsd_offset = lvd->_lvd_use.fsd_loc.loc.lb_num; 373 if (udf_find_partmaps(udfmp, lvd)) 374 break; 375 logvol_found = 1; 376 } 377 pd = (struct part_desc *)bp->b_data; 378 if (!udf_checktag(&pd->tag, TAGID_PARTITION)) { 379 part_found = 1; 380 part_num = pd->part_num; 381 udfmp->part_len = pd->part_len; 382 udfmp->part_start = pd->start_loc; 383 } 384 385 brelse(bp); 386 bp = NULL; 387 if ((part_found) && (logvol_found)) 388 break; 389 } 390 391 if (!part_found || !logvol_found) { 392 error = EINVAL; 393 goto bail; 394 } 395 396 if (fsd_part != part_num) { 397 printf("FSD does not lie within the partition!\n"); 398 error = EINVAL; 399 goto bail; 400 } 401 402 403 /* 404 * Grab the Fileset Descriptor 405 * Thanks to Chuck McCrobie <mccrobie@cablespeed.com> for pointing 406 * me in the right direction here. 407 */ 408 sector = udfmp->part_start + fsd_offset; 409 if ((error = RDSECTOR(devvp, sector, udfmp->bsize, &bp)) != 0) { 410 printf("Cannot read sector %d of FSD\n", sector); 411 goto bail; 412 } 413 fsd = (struct fileset_desc *)bp->b_data; 414 if (!udf_checktag(&fsd->tag, TAGID_FSD)) { 415 fsd_found = 1; 416 bcopy(&fsd->rootdir_icb, &udfmp->root_icb, 417 sizeof(struct long_ad)); 418 } 419 420 brelse(bp); 421 bp = NULL; 422 423 if (!fsd_found) { 424 printf("Couldn't find the fsd\n"); 425 error = EINVAL; 426 goto bail; 427 } 428 429 /* 430 * Find the file entry for the root directory. 431 */ 432 sector = udfmp->root_icb.loc.lb_num + udfmp->part_start; 433 size = udfmp->root_icb.len; 434 if ((error = udf_readlblks(udfmp, sector, size, &bp)) != 0) { 435 printf("Cannot read sector %d\n", sector); 436 goto bail; 437 } 438 439 root_fentry = (struct file_entry *)bp->b_data; 440 if ((error = udf_checktag(&root_fentry->tag, TAGID_FENTRY))) { 441 printf("Invalid root file entry!\n"); 442 goto bail; 443 } 444 445 brelse(bp); 446 bp = NULL; 447 448 devvp->v_rdev->si_mountpoint = mp; 449 450 mtx_init(&udfmp->hash_mtx, "udf_hash", NULL, MTX_DEF); 451 udfmp->hashtbl = phashinit(UDF_HASHTBLSIZE, M_UDFMOUNT, &udfmp->hashsz); 452 453 return 0; 454 455 bail: 456 if (udfmp != NULL) 457 FREE(udfmp, M_UDFMOUNT); 458 if (bp != NULL) 459 brelse(bp); 460 if (needclose) 461 VOP_CLOSE(devvp, FREAD, NOCRED, td); 462 return error; 463 }; 464 465 static int 466 udf_unmount(struct mount *mp, int mntflags, struct thread *td) 467 { 468 struct udf_mnt *udfmp; 469 int error, flags = 0; 470 471 udfmp = VFSTOUDFFS(mp); 472 473 if (mntflags & MNT_FORCE) 474 flags |= FORCECLOSE; 475 476 if ((error = vflush(mp, 0, flags))) 477 return (error); 478 479 udfmp->im_devvp->v_rdev->si_mountpoint = NULL; 480 error = VOP_CLOSE(udfmp->im_devvp, FREAD, NOCRED, td); 481 vrele(udfmp->im_devvp); 482 483 if (udfmp->s_table != NULL) 484 FREE(udfmp->s_table, M_UDFMOUNT); 485 486 if (udfmp->hashtbl != NULL) 487 FREE(udfmp->hashtbl, M_UDFMOUNT); 488 489 FREE(udfmp, M_UDFMOUNT); 490 491 mp->mnt_data = (qaddr_t)0; 492 mp->mnt_flag &= ~MNT_LOCAL; 493 494 return (0); 495 } 496 497 static int 498 udf_root(struct mount *mp, struct vnode **vpp) 499 { 500 struct udf_mnt *udfmp; 501 struct vnode *vp; 502 ino_t id; 503 int error; 504 505 udfmp = VFSTOUDFFS(mp); 506 507 id = udf_getid(&udfmp->root_icb); 508 509 error = udf_vget(mp, id, LK_EXCLUSIVE, vpp); 510 if (error) 511 return error; 512 513 vp = *vpp; 514 vp->v_vflag |= VV_ROOT; 515 udfmp->root_vp = vp; 516 517 return (0); 518 } 519 520 static int 521 udf_statfs(struct mount *mp, struct statfs *sbp, struct thread *td) 522 { 523 struct udf_mnt *udfmp; 524 525 udfmp = VFSTOUDFFS(mp); 526 527 sbp->f_bsize = udfmp->bsize; 528 sbp->f_iosize = udfmp->bsize; 529 sbp->f_blocks = udfmp->part_len; 530 sbp->f_bfree = 0; 531 sbp->f_bavail = 0; 532 sbp->f_files = 0; 533 sbp->f_ffree = 0; 534 if (sbp != &mp->mnt_stat) { 535 sbp->f_type = mp->mnt_vfc->vfc_typenum; 536 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN); 537 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 538 } 539 540 return 0; 541 } 542 543 int 544 udf_vget(struct mount *mp, ino_t ino, int flags, struct vnode **vpp) 545 { 546 struct buf *bp; 547 struct vnode *devvp; 548 struct udf_mnt *udfmp; 549 struct thread *td; 550 struct vnode *vp; 551 struct udf_node *unode; 552 struct file_entry *fe; 553 int error, sector, size; 554 555 td = curthread; 556 udfmp = VFSTOUDFFS(mp); 557 558 /* See if we already have this in the cache */ 559 if ((error = udf_hashlookup(udfmp, ino, flags, vpp)) != 0) 560 return (error); 561 if (*vpp != NULL) { 562 return (0); 563 } 564 565 /* 566 * Allocate memory and check the tag id's before grabbing a new 567 * vnode, since it's hard to roll back if there is a problem. 568 */ 569 unode = uma_zalloc(udf_zone_node, M_WAITOK); 570 if (unode == NULL) { 571 printf("Cannot allocate udf node\n"); 572 return (ENOMEM); 573 } 574 575 /* 576 * Copy in the file entry. Per the spec, the size can only be 1 block. 577 */ 578 sector = ino + udfmp->part_start; 579 devvp = udfmp->im_devvp; 580 if ((error = RDSECTOR(devvp, sector, udfmp->bsize, &bp)) != 0) { 581 printf("Cannot read sector %d\n", sector); 582 uma_zfree(udf_zone_node, unode); 583 return (error); 584 } 585 586 fe = (struct file_entry *)bp->b_data; 587 if (udf_checktag(&fe->tag, TAGID_FENTRY)) { 588 printf("Invalid file entry!\n"); 589 uma_zfree(udf_zone_node, unode); 590 brelse(bp); 591 return (ENOMEM); 592 } 593 size = UDF_FENTRY_SIZE + fe->l_ea + fe->l_ad; 594 MALLOC(unode->fentry, struct file_entry *, size, M_UDFFENTRY, 595 M_NOWAIT | M_ZERO); 596 if (unode->fentry == NULL) { 597 printf("Cannot allocate file entry block\n"); 598 uma_zfree(udf_zone_node, unode); 599 brelse(bp); 600 return (ENOMEM); 601 } 602 603 bcopy(bp->b_data, unode->fentry, size); 604 605 brelse(bp); 606 bp = NULL; 607 608 if ((error = udf_allocv(mp, &vp, td))) { 609 printf("Error from udf_allocv\n"); 610 uma_zfree(udf_zone_node, unode); 611 return (error); 612 } 613 614 unode->i_vnode = vp; 615 unode->hash_id = ino; 616 unode->i_devvp = udfmp->im_devvp; 617 unode->i_dev = udfmp->im_dev; 618 unode->udfmp = udfmp; 619 vp->v_data = unode; 620 VREF(udfmp->im_devvp); 621 udf_hashins(unode); 622 623 switch (unode->fentry->icbtag.file_type) { 624 default: 625 vp->v_type = VBAD; 626 break; 627 case 4: 628 vp->v_type = VDIR; 629 break; 630 case 5: 631 vp->v_type = VREG; 632 break; 633 case 6: 634 vp->v_type = VBLK; 635 break; 636 case 7: 637 vp->v_type = VCHR; 638 break; 639 case 9: 640 vp->v_type = VFIFO; 641 break; 642 case 10: 643 vp->v_type = VSOCK; 644 break; 645 case 12: 646 vp->v_type = VLNK; 647 break; 648 } 649 *vpp = vp; 650 651 return (0); 652 } 653 654 struct ifid { 655 ushort ifid_len; 656 ushort ifid_pad; 657 int ifid_ino; 658 long ifid_start; 659 }; 660 661 static int 662 udf_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 663 { 664 struct ifid *ifhp; 665 struct vnode *nvp; 666 int error; 667 668 ifhp = (struct ifid *)fhp; 669 670 if ((error = VFS_VGET(mp, ifhp->ifid_ino, LK_EXCLUSIVE, &nvp)) != 0) { 671 *vpp = NULLVP; 672 return (error); 673 } 674 675 *vpp = nvp; 676 return (0); 677 } 678 679 static int 680 udf_vptofh (struct vnode *vp, struct fid *fhp) 681 { 682 struct udf_node *node; 683 struct ifid *ifhp; 684 685 node = VTON(vp); 686 ifhp = (struct ifid *)fhp; 687 ifhp->ifid_len = sizeof(struct ifid); 688 ifhp->ifid_ino = node->hash_id; 689 690 return (0); 691 } 692 693 static int 694 udf_find_partmaps(struct udf_mnt *udfmp, struct logvol_desc *lvd) 695 { 696 union udf_pmap *pmap; 697 struct part_map_spare *pms; 698 struct regid *pmap_id; 699 struct buf *bp; 700 unsigned char regid_id[UDF_REGID_ID_SIZE + 1]; 701 int i, ptype, psize, error; 702 703 for (i = 0; i < lvd->n_pm; i++) { 704 pmap = (union udf_pmap *)&lvd->maps[i * UDF_PMAP_SIZE]; 705 ptype = pmap->data[0]; 706 psize = pmap->data[1]; 707 if (((ptype != 1) && (ptype != 2)) || 708 ((psize != UDF_PMAP_SIZE) && (psize != 6))) { 709 printf("Invalid partition map found\n"); 710 return (1); 711 } 712 713 if (ptype == 1) { 714 /* Type 1 map. We don't care */ 715 continue; 716 } 717 718 /* Type 2 map. Gotta find out the details */ 719 pmap_id = (struct regid *)&pmap->data[4]; 720 bzero(®id_id[0], UDF_REGID_ID_SIZE); 721 bcopy(&pmap_id->id[0], ®id_id[0], UDF_REGID_ID_SIZE); 722 723 if (bcmp(®id_id[0], "*UDF Sparable Partition", 724 UDF_REGID_ID_SIZE)) { 725 printf("Unsupported partition map: %s\n", ®id_id[0]); 726 return (1); 727 } 728 729 pms = &pmap->pms; 730 MALLOC(udfmp->s_table, struct udf_sparing_table *, pms->st_size, 731 M_UDFMOUNT, M_NOWAIT | M_ZERO); 732 if (udfmp->s_table == NULL) 733 return (ENOMEM); 734 735 /* Calculate the number of sectors per packet. */ 736 /* XXX Logical or physical? */ 737 udfmp->p_sectors = pms->packet_len / udfmp->bsize; 738 739 /* 740 * XXX If reading the first Sparing Table fails, should look 741 * for another table. 742 */ 743 if ((error = udf_readlblks(udfmp, pms->st_loc[0], pms->st_size, 744 &bp)) != 0) { 745 printf("Failed to read Sparing Table at sector %d\n", 746 pms->st_loc[0]); 747 return (error); 748 } 749 bcopy(bp->b_data, udfmp->s_table, pms->st_size); 750 brelse(bp); 751 752 if (udf_checktag(&udfmp->s_table->tag, 0)) { 753 printf("Invalid sparing table found\n"); 754 return (EINVAL); 755 } 756 757 /* See how many valid entries there are here. The list is 758 * supposed to be sorted. 0xfffffff0 and higher are not valid 759 */ 760 for (i = 0; i < udfmp->s_table->rt_l; i++) { 761 udfmp->s_table_entries = i; 762 if (udfmp->s_table->entries[i].org >= 0xfffffff0) 763 break; 764 } 765 } 766 767 return (0); 768 } 769